JP2000169767A - Vermin attraction-inhibiting acrylic resin film and laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an acrylic resin film, which exhibits a satisfactory vermin attraction-inhibiting effect and is ready for use as a protective film. SOLUTION: The vermin attraction-inhibiting acrylic resin film, which has a thickness of 300 μm or below and is excellent in transparency, has a transmittance of light having a wavelength of 400 nm or below at 20% or below and a transmittance of light in a visible light range of 420 nm or below at 55% or over, and the laminate has the above film on the surface thereof. In order to cut off UV light at 400 nm or below, the film should preferably comprise a combination of (a) 0.05 to 6 g/m2 of an azomethine UV absorber, an indole UV absorber or a benzophenone UV absorber, and (b) 0.2 to 6 g/m2 of a benzotriazole UV absorber or a triazine UV absorber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pest attractant-preventing acrylic resin film which blocks light having a wavelength to which pests are sensitive from transmitting to the outside, thereby preventing the pests from actively flying by light. And a laminate having the film on the surface. INDUSTRIAL APPLICABILITY The present invention is useful, for example, as a protective film or a protective plate for preventing pest attraction in applications such as lighting covers, show windows, vending machine front panels, and glazing.

[0002]

2. Description of the Related Art Flying insects have been a problem in various fields. For example, an accident in which a flying insect such as a fly or a mosquito is mixed into a product of a food factory is a serious problem in quality control. Recently, factories are often located in suburban areas, and agricultural pests such as planthoppers and leafhoppers generated from surrounding paddy fields and fields are attracted by lights and fly to the factories, causing product contamination. There are many.

[0003] In addition, pests attracted to evening lights in villas, mountain cottages, suburban restaurants, and the like often fly on window glasses, and have a poor impression on customers. In particular, during the breeding season of termites and the like, they fly in thousands or tens of thousands and hit show windows and the like, which sometimes hinders sales.

Further, moths and the like are attracted to show windows, telephone booths, street lights, vending machines, highway lights and the like not only in suburban areas but also in urban areas, giving an unpleasant and unpleasant impression.

[0005] Measures against such flying insects include, for example, extermination with an insecticide, induced insecticide with an adhesive tape, prevention of invasion by an air curtain, prevention of invasion by a strip curtain, prevention of invasion by a screen door, and the like.

[0006]

The above-mentioned conventional countermeasures are all focused on controlling pests that have come flying, so that the control effect is insufficient or used for controlling. Secondary harm is caused by insecticides and the like.

[0007] For example, when an insect screen is used, it is possible to prevent invasion into the room to some extent, but it is not possible to prevent flying or adhesion to window glass or the like. Therefore, flying pests often fly around the building and invade through gaps, particularly in small gaps such as under aluminum sash rails.

[0008] For example, in the case of extermination with an insecticide, secondary adverse effects such as toxicity, product safety and environmental pollution are induced. Further, in the conventional insect repellent light, since the lighting itself is treated, the indoor lighting becomes colored light, which often impairs the habitability. On the other hand, JP-A-9-472
No. 15 discloses a synthetic resin color chip containing each color pigment as a main component, an ultraviolet absorber in a base material, and a wavelength of 200 to
A pest attractant (film or the like) having a light transmittance of 10% or less at 420 nm, 30% or less at a wavelength of 420 to 480 nm, and 20 to 50% at a wavelength of 480 nm or more is disclosed. However, this pest-inducing material is not yet sufficient in terms of its pest-inducing effect.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and has a sufficient pest attraction inhibiting effect, is easy to use as a protective film, and has excellent transparency. It is an object of the present invention to provide a resin film and a laminate using the film.

[0010]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the above object, and as a result, have cut ultraviolet rays over the entire ultraviolet region of 400 nm or less, and have high transmittance in the visible light region of 420 nm or more, In addition, the acrylic resin film with a specific thickness has been found to significantly improve the light blocking property of the wavelength at which the pests are responsive, easy to use as a protective film, and excellent in transparency, and completed the present invention. I came to.

That is, the present invention is excellent in transparency having a thickness of 300 μm or less, wherein the transmittance at a wavelength of 400 nm or less is 20% or less and the transmittance in a visible light region of 420 nm or more is 55% or more. This is an acrylic resin film that prevents pest attraction.

Further, the present invention is a laminate comprising the acrylic resin film for preventing pest attraction on its surface.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below.

The pest-inducing acrylic resin film of the present invention is a film containing an acrylic resin as a main component (base resin). By using this acrylic resin, excellent weather resistance can be imparted to the film.

The acrylic resin is not particularly limited. For example, at least one selected from the group consisting of methyl methacrylate, ethyl methacrylate, propyl methacrylate and butyl methacrylate is used as a main raw material, and if necessary, an alkyl group having 1 to 8 carbon atoms is used. And a homopolymer or a copolymer obtained by using an acrylic ester having the following formula, vinyl acetate, vinyl chloride, styrene, acrylonitrile methacrylonitrile, or the like as a copolymer component.

Further, Japanese Patent Publication No. 62-19309, Japanese Patent Publication No. 63-20449, and Japanese Patent Application Laid-Open No. 63-779
No. 63, an acrylic resin polymerized in multiple stages can also be used.

The thickness of the pest attracting acrylic resin film of the present invention is 300 μm or less. This thickness is 300μ
If it exceeds m, the rigidity of the film increases, and it becomes difficult to use the film as a protective film.

The pest attractant-preventing acrylic resin film of the present invention is a film that blocks ultraviolet rays of 400 nm or less. Here, cutting ultraviolet rays having a wavelength of 400 nm or less means that the transmittance of ultraviolet rays having a wavelength of 370 nm to 400 nm is reduced to 20% or less.

In order to cut off ultraviolet rays having a wavelength of 400 nm or less, at least one ultraviolet absorbent (a) selected from the group consisting of an azomethine ultraviolet absorbent, an indole ultraviolet absorbent, and a benzophenone ultraviolet absorbent, It is desirable to contain at least one ultraviolet absorber (b) selected from the group consisting of a triazole ultraviolet absorber and a triazine ultraviolet absorber.

When this ultraviolet absorbent (a) is contained, 3
There is a tendency that the ultraviolet rays in the range of 80 to 400 nm can be sufficiently cut off, and when the ultraviolet absorbent (b) is contained, 38
There is a tendency that the ultraviolet rays in the region of 0 nm or less can be sufficiently cut, and when both (a) and (b) are contained together, there is a tendency that it can be sufficiently cut over the entire region of the ultraviolet region of 400 nm or less.

In the present invention, the transmittance in the visible light region of 420 nm or more is 55% or more, so that the transparency is good.

Among the ultraviolet absorbers (a), commercially available azomethine-based ultraviolet absorbers include, for example, Bonassorb U
A-3701 (trade name, manufactured by Orient Chemical Industry Co., Ltd.)
Is mentioned. Commercially available indole-based ultraviolet absorbers include, for example, Bonassorb UA-3901 (trade name, manufactured by Orient Chemical Industry Co., Ltd.). Commercially available benzophenone-based ultraviolet absorbers include, for example, Ubinal D-49 and Ubinal D-50 (both are trade names,
BASF).

Among the ultraviolet absorbers (b), commercially available benzotriazole-based ultraviolet absorbers include, for example, Adeka LA-31 (trade name, manufactured by Asahi Denka Kogyo KK). Commercial products of the triazine-based ultraviolet absorber include, for example, Tinuvin 1577 (trade name, manufactured by Ciba Geigy).

It should be noted that the UV absorber is classified into any of these UV absorbers according to the main skeleton of the chemical structural formula.

The ultraviolet absorber (a) is added to the film in an amount of 0.1.
It is preferably contained at a rate of 0.05 to 6 g / m ² .
If this ratio is 0.05 g / m ² or more, 380 to 40
There is a tendency that ultraviolet rays in a region of 0 nm can be sufficiently cut. If it is 6 g / m ² or less, the film-forming properties, appearance, economical efficiency and the like tend to be good, depending on the thickness of the film. Further, this ratio is preferably 0.15 to 3 g / m ² .

The ultraviolet absorber (b) is added to the film in an amount of 0.1.
It is preferably contained at a rate of ^{2 to} 6 g / m ² . If the ratio is 0.2 g / m ² or more, the ultraviolet rays having a wavelength of 380 nm or less tend to be sufficiently cut. In addition, 6g /
If m ² or less, the film-forming properties, appearance, and the like tend to be good.

Further, an ultraviolet absorber other than the above-described ultraviolet absorbers (a) and (b), for example, an ultraviolet absorber composed of a salicylic acid derivative, substituted acrylonitriles, nickel complexes, etc., may be contained.

The acrylic resin film for preventing insect pests of the present invention may contain, if necessary, a general compounding agent such as a stabilizer, a processing aid, a plasticizer, an impact-resistant auxiliary, a foaming agent, a filler, a coloring agent. Agents, antibacterial agents and the like can also be added.

The acrylic resin film for preventing insect pests of the present invention is produced, for example, by blending an acrylic resin with an ultraviolet absorber (a) or (b) and then by a melt extrusion method such as a T-die method or an inflation method. Can be.

If the pest-inducing acrylic resin film of the present invention is provided on the surface of various substrates by lamination or the like, a good laminate in which pest-inducing is prevented can be obtained. In addition, since it has an extremely excellent ultraviolet absorbing ability and very good weather resistance, it can be suitably used outdoors or in a place where sunlight is irradiated.

Examples of the substrate include various conventionally known thermoplastic resins such as polycarbonate and acrylic resin. When the above-mentioned thermoplastic resin is used as the base material, the lamination can be performed by, for example, thermal lamination, which is very advantageous in terms of cost. Moreover, the above-mentioned thermoplastic resin is formed by vacuum molding, pressure molding, push-up molding,
Good post-processing properties such as bending. Further, with respect to other thermoplastic resins, the films can be bonded together by means such as coextrusion, in-mold molding, or bonding with an adhesive. The method of providing a film on the surface of the substrate as described above is a very useful method in that an expensive ultraviolet absorber can be efficiently dispersed on the surface.

The laminate of the present invention is characterized by having the pest attracting prevention acrylic resin film on the surface. The laminate exhibits good pest attraction inhibiting properties and has very good weather resistance, so that a protective film or protective film for inhibiting pest attraction in applications such as lighting covers, show windows, vending machine front panels, and glazing. Very useful as a board.

[0033]

EXAMPLES The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples. In the following description, “parts” means “parts by weight”.

<Examples 1 to 12 and Comparative Examples 1 to 5> A methyl methacrylate-butyl acrylate copolymer (trade name: Hipet HBS-000, manufactured by Mitsubishi Rayon Co., Ltd.) was used as an acrylic resin. Various ultraviolet absorbers were added to 100 parts at the concentrations shown in Table 1.

Using a 40 mmφ screw type extruder (L / D = 26), the mixture was heated to a cylinder temperature of 20.
The mixture was melt-kneaded at 0 to 260 ° C. and a die temperature of 250 ° C., and pelletized. The pellets are dried at 80 ° C.
An acrylic resin film having a thickness of 50 μm was formed using a 0φ extruder and a T-die.

The obtained acrylic resin film is 3 mm
Laminated on a thick acrylic plate by thermal lamination,
When vacuum forming was performed, good forming was possible.

On the other hand, the ultraviolet absorption performance of the obtained acrylic resin film was measured. An acrylic resin film was attached to the illuminator equipped with a white fluorescent lamp (40 W) manufactured by Mitsubishi Electric OSRAM Co., Ltd., which was installed at intervals of 5 m. Were captured with an adhesive sheet attached to the left and right sides of the sample, and the number of the captured samples was counted. In addition, this test is the result of the sum total repeated three times while changing the position of the illuminator. Table 2 shows the results.

[0038]

[Table 1] In Table 1, "UA-3701" indicates a commercially available azomethine-based ultraviolet absorber (trade name: Bonasorb UA-3701, manufactured by Orient Chemical Industry Co., Ltd.), and "UA-3901".
Represents a commercially available indole-based ultraviolet absorber (trade name: Bonasorb UA-3901, manufactured by Orient Chemical Industries, Ltd.), and “D-49” and “D-50” represent commercially available benzophenone-based ultraviolet absorbers ( BASF, trade names Ubinal D-49, Ubinal D-50) and "LA
“-31” indicates a commercially available benzotriazole-based ultraviolet absorber (Adeka LA-31, manufactured by Asahi Denka Kogyo Co., Ltd.), and “Tinuvin 1577” indicates a commercially available triazine-based ultraviolet absorber (manufactured by Ciba-Geigy, Tinuvin. 1577).

[0039]

[Table 2] As shown in Table 2, in Examples 1 to 8, the ultraviolet absorbers (a) and (b) were used in combination, and the content ratio of the ultraviolet absorber (a) was 0.05 to 6 g / m ² . Within the range, the ultraviolet rays of 400 nm or less are sufficiently cut, so that an excellent effect of inhibiting pest attraction can be obtained.
Since the transmittance in the visible light region of nm or more is 55% or more, the transparency is good. On the other hand, in Comparative Examples 1 to 5, the ratio of the content of the ultraviolet absorbent (a) was less than 0.05 m ² ,
Since the cut of wavelengths around 90 nm and 400 nm is insufficient, the effect of preventing pest attraction cannot be obtained.

[0040]

As described above, according to the present invention, the property of blocking light having a wavelength at which a pest is sensitive is greatly improved, a sufficient effect of preventing pests from being attracted is obtained, and the pest is easily used as a protective film. In addition, it is possible to provide a pest-inducing acrylic resin film having excellent transparency and a laminate using the film.

 ────────────────────────────────────────────────── ─── Continued on front page (72) Inventor Kazuaki Hayashida 20-1 Miyukicho, Otake City, Hiroshima Prefecture Mitsubishi Rayon Co., Ltd. Otake Works F-term (reference) 2B121 AA12 BB25 EA22 EA30 FA13 4F100 AA25A AT00A AT00B BA02 CA07A EJ17 EJ42 GB90 JC00 JN01A JN30A YY00A

Claims (8)

[Claims] 1. The transmittance at a wavelength of 400 nm or less is 20%.
And the transmittance in the visible light region of 420 nm or more is 5
An acrylic resin film having an excellent transparency and a thickness of 300 μm or less, which is 5% or more. 2. An azomethine-based ultraviolet absorber, an indole-based ultraviolet absorber and a benzophenone-based ultraviolet absorber, which are mainly composed of an acrylic resin, and at least one ultraviolet absorber (a) selected from the group consisting of: A UV absorber containing at least one UV absorber (b) selected from the group consisting of a triazole UV absorber and a triazine UV absorber; and (a)
^{2. The} acrylic resin film according to claim 1, wherein the content ratio is 0.05 to 6 g / m ² in the film. 3. The content ratio of the ultraviolet absorbent (b) is as follows:
The acrylic resin film according to claim ² , wherein the amount is 0.2 to 6 g / m2 in the film. 4. A laminate comprising the pest attractant-preventing acrylic resin film according to claim 1 on the surface. 5. A resin laminate for a lighting cover, comprising the acrylic resin film for preventing insect pests according to claim 1 on the surface. 6. A resin laminate for a show window, which has the acrylic resin film for preventing insect pests according to claim 1 on its surface. 7. A resin laminate for a vending machine front panel, comprising the pest attracting acrylic resin film according to claim 1 on the surface. 8. A resin laminate for glazing, comprising the pest-inducing acrylic resin film according to claim 1 on the surface.